Enzymes: By chance, or by design? Enzymes are well known for speeding up reactions. But have they evolved to use quantum mechanics to exert them effects? Philip Ball meets the researchers who are trying to find out

Ecology: Ethics and amphibians, A statistical study shows convincingly that a technique for marking frogs in ecological field experiments compromises the results. Present practices need a rethink — and not only for practical reasons

Cancer: An inflammatory link the NF-B protein is a key player in inflammation. It now seems that it might also activate signalling pathways, in both cancer cells and tumour-associated inflammatory cells, that promote malignancy